Performance appraisal, an effective method for human resource management, is getting increasing attention by more and more foundry enterprises. Traditional manual methods, though laborious and not conductive to the management, have been widely used to appraise employee’s performance in the past years. Most domestic foundry enterprises have achieved a certain extent of informationization, during which lots of valuable data are accumulated, but these data rarely play a significant role in performance appraisal. In order to solve these problems, this paper analyzes the features of performance appraisal methods of these foundry enterprises, then designs and implements a Performance Appraisal System (PAS) based on data integration. PAS is suitable for enterprises at different informationization levels. The aim of PAS is to achieve a more rapid, fair and accurate performance appraisal and help to promote informationization of foundry enterprises.